Additional information collected about the earthquake may also prompt U.S.G.S. scientists to update the shake-severity map. An aftershock is usually a smaller earthquake that follows a larger one ...
A map of the nearby region shows the locations ... and generally decrease in frequency and magnitude over time, with the largest aftershock usually about 1 to 2 magnitude units smaller than ...
The strongest aftershock was a magnitude-4.7 about two ... Click here to see an updated USGS map of recent earthquakes. There have been no reports of significant damage, but residents and business ...
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